Welcome to Healthcare Magic You need to understand constipation is one of the main causes of anal fissure. You need to stop eating junk food, fatty food, spicy food. Eat more fresh fruits and green leafy vegetables, drink plenty of water everyday. You can use warm water in a shallow tub and sit in it twice a day. You can apply Lignocaine gel in the painful area before and after stool for pain relief. Consult a Surgeon at a Hospital who will be able to tell if it needs surgery or not, chronic fissure will need surgery to cure in most cases.